US8974152B2 - Polymer grouting method for constructing vertical supporting system - Google Patents
Polymer grouting method for constructing vertical supporting system Download PDFInfo
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- US8974152B2 US8974152B2 US13/866,026 US201313866026A US8974152B2 US 8974152 B2 US8974152 B2 US 8974152B2 US 201313866026 A US201313866026 A US 201313866026A US 8974152 B2 US8974152 B2 US 8974152B2
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- polymer
- grouting
- supporting system
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- vertical supporting
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- 229920000642 polymer Polymers 0.000 title claims abstract description 157
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000010276 construction Methods 0.000 claims abstract description 40
- 230000010485 coping Effects 0.000 claims abstract description 21
- 238000012545 processing Methods 0.000 claims abstract description 15
- 239000002689 soil Substances 0.000 claims description 35
- 238000004873 anchoring Methods 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 25
- 230000002787 reinforcement Effects 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 21
- 239000002861 polymer material Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000002775 capsule Substances 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 10
- 238000007493 shaping process Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 7
- 230000002045 lasting effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- 238000005516 engineering process Methods 0.000 description 20
- 238000009412 basement excavation Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009440 infrastructure construction Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/13—Foundation slots or slits; Implements for making these slots or slits
Definitions
- the present invention belongs to a side slope excavating supporting technology field of infrastructures of civil engineering, water conservancy, mining, municipality, etc., and particularly relates to a polymer grouting method for constructing vertical supporting system of excavating of foundation pit, side slope, municipal pipeline, etc.
- the water stopping method in the side slope supporting system is embodied as technologies, such as cement mixing piles, high-pressure jet grouting pile, and TRD method.
- technologies such as cement mixing piles, high-pressure jet grouting pile, and TRD method.
- the above supporting technologies played important roles in practical projects, but they also have some technical shortages. For example, it is difficult to use the soil nailing wall under the condition of soft soil, unbonded loose sandy soil and rich underground water. In addition, when the soil nailing wall is used as a permanent structure, the problem of durability, such as corrosion, should be considered.
- the design of the composite soil nailing wall is mostly borrowed from the design of soil nailing wall, and the role of advance supporting and water-stopping curtain are not considered in the design and calculation of the composite soil nailing wall.
- For the underground continuous wall sandy soil and mud dug out requires for the settlement equipment and the mechanical equipment, so the cost is high.
- the drainage tends to pollute the underground water, and excavating the slot tends to cause the settlement of the buildings.
- For the row pile supporting structure there is no mature design method at present, and there are few systematic and in-depth researches on the stress mechanism, the working properties and the applicable conditions of the row pile.
- the conventional side slope supporting technology mostly uses cement materials, so the water stopper constructed is a rigid solid having an elastic modulus greatly different from the elastic modulus of the soil, and is poor in impervious anti-cracking property.
- the materials and the soil are disassembled, when stopping the water, and the material grouted in is difficult to form a complete continuum.
- the water stopper is formed by the construction methods, such as excavating slots, mixing, spraying and vibrating, so the side slope structure is greatly damaged by turbulent motions.
- the construction period will be extended to 2 ⁇ 3 times, and the cost will increase by more than 1 time.
- the current situation is not suitable for the development requirement of the infrastructure building of civil engineering, water conservancy, mining, municipality, etc. of our country at present. Therefore, the research and development of the supporting system combining supporting structure and the water-blocking function is an important technological problem to be solved in the present in the side slope excavation process of civil engineering, water conservancy and municipality infrastructure constructions, such as foundation pit, side slope and municipal pipeline excavation.
- Polymer grouting technology is a rapid foundation reinforcement technology developing in the 1970s. This technology takes advantage of characteristic that the polymer materials expand rapidly and solidify after the chemical reaction to reinforce the foundation, fill the void, and raise the floor by injecting the polymer materials into the foundation.
- the polymer grouting technology is mainly applied in field of foundation reinforcement of industrial and civil building and road maintenance.
- the present invention provides a polymer grouting method for constructing a vertical supporting system combining water-blocking function and supporting reinforce function, and provides a new supporting technology to excavation of foundation pit, side slope and municipal pipeline. At present, there is no report related to the polymer grouting method for constructing vertical supporting system.
- An object of the present invention is to provide a polymer grouting method for constructing a vertical supporting system combining a water-blocking function and a supporting reinforce function to meet developing requirements of excavation supporting of foundation pit, side slope and municipal pipeline, and to make up for the shortage of the conventional supporting technology.
- the present invention is developed based on giving full play to the small permeability coefficient, good durability, and excellent expansion characteristics of the polymer materials, the earth pressure theory and the geotechnical anchoring theory.
- the slots of foundation pits, side slopes, municipal pipelines, etc. can be excavated vertically fast by adopting the present invention, which realizes advance water blocking and retaining for the side slopes in the process of excavation in the real sense, and greatly increases supporting speed of the side slopes.
- the present invention provides a new method to the excavation and supporting of the foundation pits, the side slopes, the municipal pipelines, etc., which is advanced, efficient, economic and practical.
- the present invention provides a polymer grouting method for constructing a vertical supporting system, comprising following steps of:
- step 3 and step 4 excavating vertically by layer in turn, wherein step 3 and step 4 is repeated until a construction of the polymer vertical supporting system reaches a projected depth, and then the construction of the polymer vertical supporting system is completed.
- the present invention has following advantages of:
- construction without water i.e. adopting construction method without water, wherein non-water reacted type polymer materials don't shrink in air, have good tractility, anti-vibrating property and anti-cracking property;
- the coping and anchor grouting can be constructed continuously without intervals, so the construction is fast and convenient, about 90% of the strength can be formed 15 minutes after the materials react, so leaving to firm is not required, compared to conventional supporting structure system, more than 80% of the construction period can be saved;
- the polymer vertical supporting system is mainly characteristic in realizing blocking water function while keeping the side slope stable, and saving a large quantity of construction period.
- the polymer grouting material has a stable performance, no pollution, a good flexibility, the polymer supporting system constructed bonds with the soil tightly, has a compatible deformation with the soil, a low permeability coefficient, and a preservative effect on the reinforcement as a water-resisting layer.
- the polymer grouting method for constructing the vertical supporting system according to the present invention has obvious advantages in construction process of excavation project of foundation pit, side slope, municipal pipeline, etc. Compared to conventional supporting technologies, the polymer grouting method for constructing the vertical supporting system is a wholly new technology, which is embodied in following aspects.
- the water-blocking panel and the anchors in the polymer vertical supporting system is embodied as a new non-water reacted typed high-molecular polymer grouting material according to an idea of flexible supporting, which has characteristics, such as safety, environmental protection, lightness, durableness, high expansion rate, good permeability resistance and early strength.
- the polymer water-blocking panel constructed is a flexible anti-seepage element, which bonds with the soil tightly, has a compatible deformation with the soil, has good anti-cracking and anti-seepage properties, and realizes advance supporting.
- the polymer vertical supporting system makes full use of the high expansion characteristic of the polymer materials.
- the polymer anchors after expanding bond tightly with the surrounding soil, and are able to provide a larger withdrawal resistance, to help keeping the polymer water-blocking panel stable and to save slope-setting unload space. All of the anchor rods work, because of being constructing connected together.
- the anchor rods are stressed synergistically, and the withdrawal resistances generated by all of the anchor rods are able to balance out a lateral soil pressure, in order to ensure a stability of the supporting system.
- the polymer grouting method for constructing the vertical supporting system makes use of self-expansibility and rheological property of the polymer material to form the ultrathin polymer water-blocking panel, and to construct the coping and the anchors, which fully shows a technical advantage of fast and convenient construction.
- the present invention is obviously different from the conventional supporting technologies in aspects of the supporting materials, the supporting ideas, the force mechanism, the construction method, etc.
- the present invention has the advantages of fastness and convenience, lightness, high tenacity, economy, durableness, etc., and is successfully applied in foundation pit supporting engineering, so the present invention has a good prospect in development and application.
- FIG. 1 is a sketch view of a polymer water-blocking panel according to a preferred embodiment of the present invention.
- FIG. 2 is a top view of FIG. 1 .
- FIG. 3 is a sketch view of a coping of a polymer vertical supporting system according to the preferred embodiment of the present invention.
- FIG. 4 is a sketch view of polymer anchors according to the preferred embodiment of the present invention.
- FIG. 5 is a connecting sketch view of polymer anchor rods according to the preferred embodiment of the present invention.
- FIG. 6 is a front sketch view of a whole impression of the polymer vertical supporting system according to the preferred embodiment of the present invention.
- FIG. 7 is a sectional view of the whole impression of the polymer vertical supporting system according to the preferred embodiment of the present invention.
- a polymer grouting method for constructing a vertical supporting system comprises following steps of:
- step 3 and step 4 excavating vertically by layer in turn, wherein step 3 and step 4 is repeated until a construction of the polymer vertical supporting system reaches a projected depth 20 , and then the construction of the polymer vertical supporting system is completed, as referred to FIG. 6 and FIG. 7 .
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
Description
-
- 1) locating the integrated polymer water-blocking panel and forming slots, comprising locating the integrated polymer water-blocking panel in an area of a side slope required to be excavated vertically according to a design, and forming slots continuously with a three-cone slot-forming plate and a direct pushing machine for slot-forming.
- 2) grouting into a slot hole, comprising putting a grouting pipe into the slot hole, wherein the grouting pipe extends to a bottom of the slot hole, injecting two-component expansive polymer grouting materials into the slot hole through the grouting pipe with a polymer grouting equipment, and lifting the grouting pipe with a lifting grouting control equipment at a same time, in such a manner that a polymer material fills the slot hole from bottom to top to form a polymer water-blocking panel, which is schistose; and
- 3) structuring the integrated polymer water-blocking panel by connecting the polymer water-blocking panels, comprising repeating the above step 2), wherein the polymer water-blocking panels in adjacent slot holes bond together tightly to form the integrated polymer water-blocking panel, which is continuous, even and regular;
-
- 1) construction of mesh reinforcements, wherein vertical mesh reinforcements are constructed by a hammer method and the horizontal mesh reinforcements are constructed by a binding method;
- 2) excavating vertically downwards in a side where a supporting system is constructed, to obtain a shallow slot having a depth of 280˜320 mm, and to interlock surface structure reinforcements and the mesh reinforcements in a coping; and
- 3) locating and installing a coping shaping steel die above the shallow slot, and processing a polymer grouting through a grouting hole preset on a top of the coping shaping steel die, to form the polymer coping of the supporting system;
-
- 1) excavating vertically by layer at a vertical spacing of 1.2-2 m, wherein a protecting soil having a thickness of 150-200 mm is reserved at a position of the integrated polymer water-blocking panel for being cleared by a manual method; and
- 2) processing polymer anchoring construction on the integrated polymer water-blocking panel cleared, comprising steps of:
- a) producing anchor rods, comprising aligning rods and removing rust from the rods, cutting welding materials, welding centring supports, and binding a hole-sealing capsule and a hole-sealing grouting pipe on an end portion of each rod, wherein the hole-sealing capsule is at a join of an anchor section and a free section when being bound, a detachable inlet valve is provided at a polymer inlet of an anchoring grouting pipe, a connecting join between the grouting pipes and a grouting gun is fixed and sealed by a hose clamp, the grouting pipes comprise two grouting pipes, a first grouting pipe is the hole-sealing grouting pipe, an outlet of which is provided in the hole-sealing capsule, and a second grouting pipe is the anchoring grouting pipe, an outlet of which is provided in a bottom of an anchoring hole;
- b) anchoring holes construction, comprising constructing anchoring holes at a spacing of 1.2-2 m;
- c) implanting the anchor rods, comprising implanting the anchor rods made before into the anchoring holes, and ensuring that each of the rods are in a central position; and
- d) polymer grouting, comprising processing hole-sealing grouting firstly, i.e. injecting the two-component expansive polymer grouting material into the hole-sealing capsule with a grouting equipment, and then processing anchoring grouting, i.e. injecting the two-component expansive polymer grouting materials into the anchoring grouting pipe with the grouting equipment, wherein the polymer material fill the anchoring holes from the bottom of the anchoring holes progressively, and the two-component expansive polymer grouting material expands and pressurizes soil of a hole wall tightly to have a close contact with the surrounding soil, in such a manner that polymer anchors are formed;
-
- 1) locating the integrated polymer water-blocking
panel 3 and forming slots, comprising locating the integrated polymer water-blockingpanel 3 in an area of a side slope required to be excavated vertically according to a design, and forming slots continuously on aground 1 with a three-cone slotting board and a static slotting machine. - 2) grouting into a
slot hole 2, comprising putting a grouting pipe into theslot hole 2, wherein the grouting pipe extends to a bottom of theslot hole 2, injecting two-component expansive polymer grouting materials into theslot hole 2 through the grouting pipe with a polymer grouting equipment, and lifting the grouting pipe with a lifting grouting control equipment at a same time, in such a manner that a polymer material fills theslot hole 2 from bottom to top to form a polymer water-blocking panel; and - 3) structuring the integrated polymer water-blocking
panel 3 by connecting the polymer water-blocking panels, comprising repeating the above step 2), wherein the polymer water-blocking panels in adjacent slot holes bond together tightly to form the integrated polymer water-blockingpanel 3, which is continuous, even and regular, as referred toFIG. 1 andFIG. 2 ;
- 1) locating the integrated polymer water-blocking
-
- 1) construction of mesh reinforcements, wherein
vertical mesh reinforcements 5 are constructed by a hammer method and thehorizontal mesh reinforcements 6 are constructed by a binding method; - 2) excavating vertically downwards in a side where a supporting system is constructed, to obtain a shallow slot having a depth of 280˜320 mm, to form a ground with the
shallow slot 4, and interlockingsurface structure reinforcements 7 and the mesh reinforcements in a coping; and - 3) locating and installing a coping shaping steel die 8 above the shallow slot, and processing a polymer grouting through a
grouting hole 9 preset on a top of the coping shapingsteel die 8, to form the polymer coping 10 of the supporting system, as referred toFIG. 3 ;
- 1) construction of mesh reinforcements, wherein
-
- 1) excavating vertically by layer at a vertical spacing of 1.2-2 m, wherein a protecting soil having a thickness of 150-200 mm is reserved at a position of the integrated polymer water-blocking
panel 3 for being cleared by a manual method; and - 2) processing polymer anchoring construction on the integrated polymer water-blocking
panel 3 cleared, comprising steps of:- a) producing anchor rods, wherein
rods 12 can be made of reinforcing bars or steel strand according to designing requirements, comprising aligning therods 12 and removing rust from the rods, cutting welding materials, welding centring supports 13, and binding a hole-sealingcapsule 15 and a hole-sealinggrouting pipe 14 on an end portion of eachrod 15, wherein the hole-sealingcapsule 15 is at a join of an anchor section and a free section when being bound, a detachable inlet valve is provided at a polymer inlet of an anchoringgrouting pipe 16, a connecting join between the grouting pipes and a grouting gun is fixed and sealed by a hose clamp, the grouting pipes comprise two grouting pipes, a first grouting pipe is the hole-sealinggrouting pipe 14, an outlet of which is provided in the hole-sealingcapsule 15, and a second grouting pipe is the anchoringgrouting pipe 16, an outlet of which is provided in a bottom of an anchoringhole 17; - b) anchoring
holes 17 construction, comprisingconstructing anchoring holes 17 at a spacing of 1.2-2 m; - c) implanting the anchor rods, comprising implanting the anchor rods made before into the anchoring holes 17 and ensuring that each of the
rods 12 is in a central position; and - d) polymer grouting, comprising processing hole-sealing grouting firstly, i.e. injecting the two-component expansive polymer grouting material into the hole-sealing
capsule 15 with a grouting equipment, and then processing anchoring grouting, i.e. injecting the two-component expansive polymer grouting material into the anchoringgrouting pipe 16 with the grouting equipment, wherein the polymer materials fill the anchoring holes 17 from the bottom of the anchoring holes 17 progressively, and the two-component expansive polymer grouting material expands and pressurizes soil of a hole wall tightly to have a close contact with the surrounding soil, in such a manner that polymer anchors 11 are formed, as referred toFIG. 4 ;
- a) producing anchor rods, wherein
- 1) excavating vertically by layer at a vertical spacing of 1.2-2 m, wherein a protecting soil having a thickness of 150-200 mm is reserved at a position of the integrated polymer water-blocking
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310123667.6A CN103215960B (en) | 2013-04-11 | 2013-04-11 | Grouting method for high polymer vertical support system |
CN201310123667 | 2013-04-11 |
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US20140314494A1 US20140314494A1 (en) | 2014-10-23 |
US8974152B2 true US8974152B2 (en) | 2015-03-10 |
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US13/866,026 Active US8974152B2 (en) | 2013-04-11 | 2013-04-19 | Polymer grouting method for constructing vertical supporting system |
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CN (1) | CN103215960B (en) |
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CN102660955B (en) * | 2012-05-17 | 2015-05-13 | 上海强劲地基工程股份有限公司 | Quick construction method for foundation pit slope support |
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CN103215960A (en) | 2013-07-24 |
US20140314494A1 (en) | 2014-10-23 |
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